Enterprise application development involves various costs, including planning, development, testing, deployment, and ongoing maintenance. The cost breakdown depends on several factors, such as project complexity, features, technology stack, and resources required. On average, the cost can range from $100,000 to millions of dollars. Customization, integrations, scalability, security, and user experience are key aspects impacting cost. Development hours, team size, technology choices, hosting fees, licensing, and infrastructure should also be considered. Hiring an experienced development team, collaborating with stakeholders, and having a clear scope can help optimize costs and ensure a successful enterprise application development project.